Road-grader attachment for wagons.



A. AMUNDSON.

ROAD GRADER ATTACHMENT FOR WAGONS.

APPLICATION FILED JUN 4,1914.

1 1 38, l 72 Patented May 4, 1915.

2 SHEETS-rSHEET I.

ZZZ/wad wwW K 79 &5 M w s gaff/M4 mfiiwwi'fd THE NORRIS PETERS CO..PHOTCVLITHOH WASHINGTON, D. C.

A. AMUNDSON.

ROAD GRADER ATTACHMENT FOR WAGONS.

APPLICATION FILED JUNE 4, 1914.

Patented May 4, 1915.

2 $HEETSSHEET 2.

IWHHIIIH Il i||1TITHHIHHIIHINIINI mmllillfll 6 0% wcm 1H: NORRIS PETERS(Ia, PHOTO |.l1H0,, WASHING [0Nv D. 4."

ALFRED AMUNDSO'N, OF GANBY,]MINNESOTA.

ROAD-GBADER ATTACHMENT FOR WAGONS.

Specification of Letters Patent.

Application filed June 4., 1914. Serial No. 842,879.

To all whom, it may concern:

Be it known that I, ALFRED AMUNDsoN, a citizen of the United States,residing at Canby, in the county of Yellow Medicine and State ofMinnesota, have invented cer tain new and useful Improvements in Road-Grader Attachments for Wagons; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

My invention has for its object to provide a road grader attachment forwagons, especially adapted as an attachment for wagons generallydesignated as farm wagons; and, to this end, the invention consists ofthe novel devices and combinations of devices hereinafter described anddefined in the claims.

In the accompanying drawings, which illustrate the invention, likecharacters indicate like partsthroughout the several views. Referring tothe drawings, Figure 1 is a side elevation of a farm wagon, havingapplied thereto in working position, the improved road graderattachment; Fig. 2 is a plan view of the same, with the wagon boxremoved and some parts broken away; Fig. 3 is a detail view, partly inelevation and partly in transverse vertical section, taken on the lineoa -00 of Fig. 1, on an enlarged scale; Fig. 41 is a detail view, partlyin elevation and partly in vertical section, taken on the line c0*-w* ofFig. 2, on an enlarged scale; and Fig. 5 is a detail view, in transversesection, taken on the line 00 w of Fig. 2, on an enlarged scale.

Of the parts of the farm wagon, it is only necessary to note, frontwheels 1, front axle 2, rear wheels 3, rear axle 4;, reach 5, hindhounds 6, and wagon box 7.

Located under the reach 5, and extending longitudinally thereof, is ahanger bar 8, having front and rear pairs of laterally and downwardlyprojecting arms 9 and 10, respectively, the purpose of which willpresently appear. The hanger bar 8 is detachably and removably securedto the reach 5 by a pair of clamping plates and cooperating draw bolts11. These clamping plates rest one on the reach 5 and the other on theforward ends of the hounds 6. The front pair of draw bolts extendsthrough the cooperating clamping plate on opposite sides of the reach 5and through the forward end portion of the hanger bar 8. The rear pairof these draw bolts extends through the cooperating clamping plate onopposite edges of the hounds 6 and through the arms 10. Obviously, byadjusting the draw bolts, the clamping plates and end portions of thehanger bar 8 may be. frictionally clamped in position on the runninggear of the wagon.

To the arms 9 is pivotally secured the forward ends of a pair ofrearwardly diverging drag bars 12, and, to the rear ends of said bars issecured a pair of scraper blades 13. The pivotal connections between thedrag bars 12 and arms 9 are in the form of nutequipped bolts 11, of alength sufiicient to permit lateral movements of said bars in respect tosaid arms. These connections also permit free raising and loweringmovements of the rear ends of the drag bars 12 to which the scraperblades 13 are attached. Coiled springs 15 are mounted on the pivot bolts14, compressed between the inner ends thereof and the arms 9, and tendto hold the drag bars 12 against lateral movement with respect to thesaid arms. The connections between the drag bars 12 and scraper blades13 are in the form of headed studs 16, passed through perforations inthe rear downturned ends of said drag bars and rigidly secured to theintermediate portions of the scraper blades 13,, and extend horizontallyand rearwardly therefrom. These headed studs 16 are of a length topermit lateral separations of the scraper blades 13 with respect to thedrag bars 12. Mounted on the studs 16 and compressed between the headsthereof and the drag bars 12, are

coiled springs 17, which tend to hold the scraper blades in fiat contactwith the bars 12. Obviously, the springs 15 and 17 will Patented May 4,1915.

yield to permit lateral movements of the drag bars 12 and scraper blades13 in case said scraper blades strike an obstruction,

thus avoiding straining or breaking of the parts of the attachment.

As best shown in Fig. 2, the scraper blades 13 are set oblique, inrespect to the direction of travel of the wagon, extend between thefront and rear wheels and about onefoot on each side thereof, and arearranged to scrape the dirt and loose stones into the center of the roadbed.

The scraper blades 13 are raised and lowered by a rock shaft 18, havinga central crank 19. This shaft 18 extends transversely of the wagon andis journaled in the outer end portions of the arms 10. To one end of theshaft 18 is rigidly, secured a bell crank 20 and to the other endthereof is rigidly secured an arm 21, which extends parallel with and inthe same plane of the lower arm of the bell crank 20. Pivotally securedto the free ends of the lower arm of the bell crank 20 and the arm 21 isa pair of depending eye-bolts 22, having nutequipped lower ends. Theintermediate portions of these eye-bolts work through perforatedbrackets 23, rigidlyjsecu-red to the intermediate portions of the dragbars 12. Coiled springs 24 are mounted on the eye-bolts 22 andcompressed between the arms, to which said eye bolts are pivotallyconnected, and the brackets 23. These springs 24: yieldingly press therear ends of the drag bars 12 downward to hold the scraper blades 13 inengagement with the road bed. In case the scraper blades strike anobstruction in the road, the springs 24 will yield to permit saidscraper blades to rise and pass over the obstruction, thus avoidingstraining or breaking of the parts of the attachment.

, reach 5.

A long coiled spring 25 is anchored at its ends to the hanger bar 8,just rearward of the arms 9, and to the crank 19. This spring isconsiderably heavier than the springs 24 and is provided for holding thecrank 19 on either side ofa dead center. Obviously, the spring 25 willassist in raising the scraper blades 13 after the crank 19' is passed adead center during the upward movement of said scraper blades and itwill also assist in holding the said scraper blades in engagement withthe road bed during the scraping thereof.

The rock shaft 18 is oscillated, to raise and lower the scraper blades13, by a latch lever 26, intermediately fulcrumed to a cooperatingsegment 27, secured to the wagon box 7i This latch lever 26 isconnected'to the upper arm of the bell crank 20 by the followingconnections: Intermediately fulcrumed to thereach 5, just forward of therear aXle 4, by. a hammer strap and cooperating pin 28, is-ahorizontally extended lever 29, which extends transversely of the Thelong end of this lever 29"is connected to the lower or short end of thelatch lever 26 by a long rod 30, and the shortend of the lever 29 isconnected to the upper arm of the bell crank 20 by a relatively shortrod :31.

Rigidly secured to the hanger bar 8, and extending transversely thereof,is a stop bar 32, which limits the upward swinging movement of the dragbars 12.

From the foregoing description, it is evident that the improvedattachment may be readily applied to or removed from awagon. Thearrangement of the scraper blades 13 is such that the dirt will bescraped into the ruts formed in the road bed by the wagon wheels, thus.leveling the road'bed,

and scraping the surplus dirt to the center 'of said road bed.

What I claim is: V 1. The comb nation with a wagon having front and rearpairs of wheels, and a reach structure connecting said front wheels tosaid rear wheels with freedom for horizontal swinging movement, of ahanger bandetachably secured to said reach structure, a pair ofrearwardly diverging drag bars pivotally connected at their forward'endsto said hangerbar, with freedom for raising and lowering movements andfor limited lateral swinging movements, springs tending to hold dragbars againstlateral movements, a pair of scraper blades, secured to saiddrag bars, extending'transversel-y of' said rear wheels and'in frontthereof, and

means for raising and lowering saiddrag bars.

2. The combination with a wagon, of a grader attachment for said wagon,comprising a drag bar, pivotally connected at its forward end to therunning gear of said wagon, with-freedom for raising and loweringmovements, and for a limited lateral movement, a spring tending to holdsaid drag bar against lateral movement, a scraper blade attached to therear end of said drag bar, and means for raising. and lowering said.scraper blade. r

In testimony whereof I affiX my signature in presence of two witnesses.

ALFRED AMUNDSON. Witnesses JOHN P. HENTGES, P. H. LEVERSON.

Copies of this patent may be obtained for five cents each, by addressingthe Gommissionen-of "Patents, Washington, D. 0'.

